def _get_limits_maximum_rjb(self, maximum_distance):
"""
Returns the bounding box of a polyon representing the locations of
maximum distance from the rupture
"""
top_left = deepcopy(self.surface.top_left)
top_left.depth = 0.
top_right = deepcopy(self.surface.top_right)
top_right.depth = 0.
bottom_left = deepcopy(self.surface.bottom_left)
bottom_left.depth = 0.
bottom_right = deepcopy(self.surface.bottom_right)
bottom_right.depth = 0.
surface_projection = Polygon([top_left,
top_right,
bottom_right,
bottom_left])
dilated_projection = surface_projection.dilate(maximum_distance)
return (np.min(dilated_projection.lons),
np.max(dilated_projection.lons),
np.min(dilated_projection.lats),
np.max(dilated_projection.lats))
def to_polygon(self, radius):
"""
Create a circular polygon with specified radius centered in the point.
:param radius:
Required radius of a new polygon, in km.
:returns:
Instance of :class:`~openquake.hazardlib.geo.polygon.Polygon` that
approximates a circle around the point with specified radius.
"""
assert radius > 0
# avoid circular imports
from openquake.hazardlib.geo.polygon import Polygon
# get a projection that is centered in the point
proj = geo_utils.OrthographicProjection(
self.longitude, self.longitude, self.latitude, self.latitude)
# create a shapely object from a projected point coordinates,
# which are supposedly (0, 0)
point = shapely.geometry.Point(*proj(self.longitude, self.latitude))
# extend the point to a shapely polygon using buffer()
# and create openquake.hazardlib.geo.polygon.Polygon object from it
return Polygon._from_2d(point.buffer(radius), proj)
def test_fault_source_outside_mag_range(self):
"""
Tests the rates when the whole fault is inside the polygon
"""
self.limits = {
"polygon":
Polygon([
Point(14.9, 14.9),
Point(14.9, 15.1),
Point(15.1, 15.1),
Point(15.1, 14.9)
]),
"upper_depth":
0.0,
"lower_depth":
20.0
}
model1 = RatePolygon(self.limits, [SIMPLE_FAULT],
area_discretisation=4.0)
model1.get_rates(6.5, 6.8)
self.assertAlmostEqual(model1.rates, 0.0)
def test_point_source_outside_mag_limit(self):
"""
Tests the case of a single point source outside the polygon
"""
self.limits = {
"polygon":
Polygon([
Point(14.9, 14.9),
Point(14.9, 15.1),
Point(15.1, 15.1),
Point(15.1, 14.9)
]),
"upper_depth":
0.0,
"lower_depth":
3.0
}
model1 = RatePolygon(self.limits, [POINT_SOURCE],
area_discretisation=4.0)
model1.get_rates(5.5, 6.0)
self.assertAlmostEqual(model1.rates, 0.0)
def node_to_area_geometry(node):
"""
Reads an area geometry node and returns the polygon, upper depth and lower
depth
"""
assert "areaGeometry" in node.tag
for subnode in node.nodes:
if "Polygon" in subnode.tag:
crds = [float(x)
for x in subnode.nodes[0].nodes[0].nodes[0].text.split()]
polygon = Polygon([Point(crds[iloc], crds[iloc + 1])
for iloc in range(0, len(crds), 2)])
elif "upperSeismoDepth" in subnode.tag:
upper_depth = float_(subnode.text)
elif "lowerSeismoDepth" in subnode.tag:
lower_depth = float_(subnode.text)
else:
# Redundent
pass
assert lower_depth > upper_depth
return polygon, upper_depth, lower_depth
def test_instantiation(self):
"""
Tests simple instantiation of the class
"""
self.limits = {
"polygon":
Polygon([
Point(14.9, 14.9),
Point(14.9, 15.1),
Point(15.1, 15.1),
Point(15.1, 14.9)
]),
"upper_depth":
0.0,
"lower_depth":
10.0
}
model1 = RatePolygon(self.limits, [POINT_SOURCE],
area_discretisation=4.0)
self.assertAlmostEqual(model1.upper_depth, 0.0)
self.assertAlmostEqual(model1.lower_depth, 10.0)
self.assertAlmostEqual(model1.rates, 0.0)
def to_polygon(self, radius):
"""
Create a circular polygon with specified radius centered in the point.
:param radius:
Required radius of a new polygon, in km.
:returns:
Instance of :class:`~openquake.hazardlib.geo.polygon.Polygon` that
approximates a circle around the point with specified radius.
"""
assert radius > 0
# avoid circular imports
from openquake.hazardlib.geo.polygon import Polygon
# get a projection that is centered in the point
proj = geo_utils.get_orthographic_projection(
self.longitude, self.longitude, self.latitude, self.latitude
)
# create a shapely object from a projected point coordinates,
# which are supposedly (0, 0)
point = shapely.geometry.Point(*proj(self.longitude, self.latitude))
# extend the point to a shapely polygon using buffer()
# and create openquake.hazardlib.geo.polygon.Polygon object from it
return Polygon._from_2d(point.buffer(radius), proj)
def get_convex_hull(self):
"""
Get a convex polygon object that contains projections of all the points
of the mesh.
:returns:
Instance of :class:`openquake.hazardlib.geo.polygon.Polygon` that
is a convex hull around all the points in this mesh. If the
original mesh had only one point, the resulting polygon has a
square shape with a side length of 10 meters. If there were only
two points, resulting polygon is a stripe 10 meters wide.
"""
proj, polygon2d = self._get_proj_convex_hull()
# if mesh had only one point, the convex hull is a point. if there
# were two, it is a line string. we need to return a convex polygon
# object, so extend that area-less geometries by some arbitrarily
# small distance.
if isinstance(polygon2d,
(shapely.geometry.LineString, shapely.geometry.Point)):
polygon2d = polygon2d.buffer(self.DIST_TOLERANCE, 1)
# avoid circular imports
from openquake.hazardlib.geo.polygon import Polygon
return Polygon._from_2d(polygon2d, proj)
def get_convex_hull(self):
"""
Get a convex polygon object that contains projections of all the points
of the mesh.
:returns:
Instance of :class:`openquake.hazardlib.geo.polygon.Polygon` that
is a convex hull around all the points in this mesh. If the
original mesh had only one point, the resulting polygon has a
square shape with a side length of 10 meters. If there were only
two points, resulting polygon is a stripe 10 meters wide.
"""
proj, polygon2d = self._get_proj_convex_hull()
# if mesh had only one point, the convex hull is a point. if there
# were two, it is a line string. we need to return a convex polygon
# object, so extend that area-less geometries by some arbitrarily
# small distance.
if isinstance(polygon2d, (shapely.geometry.LineString,
shapely.geometry.Point)):
polygon2d = polygon2d.buffer(self.DIST_TOLERANCE, 1)
# avoid circular imports
from openquake.hazardlib.geo.polygon import Polygon
return Polygon._from_2d(polygon2d, proj)
OUTSIDE_POINT_SOURCE = PointSource(
"PNT000", "Point 000",
"Active Shallow Crust",
EvenlyDiscretizedMFD(5.0, 0.1, [1.0]),
1.0,
PointMSR(),
1.0,
PoissonTOM(1.0),
0.0,
20.0,
Point(15.0, 15.2),
PMF([(1.0, NodalPlane(0.0, 90.0, 0.0))]),
PMF([(1.0, 5.0)]))
AREA_POLY = Polygon([Point(14.95, 15.05),
Point(15.05, 15.05),
Point(15.05, 14.95),
Point(14.95, 14.95)])
AREA_SOURCE = AreaSource("AREA000", "Area 000",
"Active Shallow Crust",
EvenlyDiscretizedMFD(5.0, 0.1, [1.0]),
1.0,
PointMSR(),
1.0,
PoissonTOM(1.0),
0.,
40.,
PMF([(1.0, NodalPlane(0.0, 90.0, 0.0))]),
PMF([(0.5, 5.0), (0.5, 15.0)]),
AREA_POLY,
4.0)
def as_polygon(self):
return Polygon([
Point(self['xmin'], self['ymax']),
Point(self['xmax'], self['ymax']),
Point(self['xmax'], self['ymin']),
Point(self['xmin'], self['ymin'])])